Cambrian Period

This is the first period of the Paleozoic Era, as well as the entire Phanerozoic Eon.

This period marked the beginning of complex life in the seas. It is sometimes called the Cambrian Explosion, as arthropods, mollusks and amphibians diversed rapidly. Plants became very common on the sea floor, as well as brachiopods. The Dickinsonia went extinct in the early part of this period.

Temperatures were quite cool, but heated up a little towards the end. The continent Pannotia broke apart, and from their formed Gondwana.